﻿// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using System.ComponentModel;
using System.Globalization;
using static System.Windows.Forms.Analyzers.ApplicationConfig;
using static System.Windows.Forms.CSharp.Generators.ApplicationConfiguration.ProjectFileReader;

namespace System.Windows.Forms.Analyzers.Tests;

public class FontConverterTests
{
    private static readonly char s_separator = ProjectFileReaderTests.s_separator;

    private static readonly string[] s_locales =
    [
        "ar-SA",
        "en-US",
        "es-ES",
        "fr-FR",
        "hi-IN",
        "ja-JP",
        "ru-RU",
        "tr-TR",
        "zh-CN"
    ];

    public static TheoryData<CultureInfo, string, string, float, int, int> TestConvertFormData()
    {
        TheoryData<CultureInfo, string, string, float, int, int> testData = [];

        foreach (string cultureName in s_locales)
        {
            CultureInfo culture = new(cultureName);

            testData.Add(culture, $"Courier New", "Courier New", PropertyDefaultValue.FontSize, (int)GraphicsUnit.Point, (int)FontStyle.Regular);
            testData.Add(culture, $"Courier New{s_separator} 11", "Courier New", 11f, (int)GraphicsUnit.Point, (int)FontStyle.Regular);
            testData.Add(culture, $"Arial{s_separator} 11px", "Arial", 11f, (int)GraphicsUnit.Pixel, (int)FontStyle.Regular);
            testData.Add(culture, $"Courier New{s_separator} 11 px", "Courier New", 11f, (int)GraphicsUnit.Pixel, (int)FontStyle.Regular);
            testData.Add(culture, $"Courier New{s_separator} 11 px{s_separator} style=Regular", "Courier New", 11f, (int)GraphicsUnit.Pixel, (int)FontStyle.Regular);
            testData.Add(culture, $"Courier New{s_separator} style=Bold", "Courier New", PropertyDefaultValue.FontSize, (int)GraphicsUnit.Point, (int)FontStyle.Bold);
            testData.Add(culture, $"Courier New{s_separator} 11 px{s_separator} style=Bold{s_separator} Italic", "Courier New", 11f, (int)GraphicsUnit.Pixel, (int)(FontStyle.Bold | FontStyle.Italic));
            testData.Add(culture, $"Courier New{s_separator} 11 px{s_separator} style=Regular, Italic", "Courier New", 11f, (int)GraphicsUnit.Pixel, (int)(FontStyle.Regular | FontStyle.Italic));
            testData.Add(culture, $"Courier New{s_separator} 11 px{s_separator} style=Bold{s_separator} Italic{s_separator} Strikeout", "Courier New", 11f, (int)GraphicsUnit.Pixel, (int)(FontStyle.Bold | FontStyle.Italic | FontStyle.Strikeout));
            testData.Add(culture, $"Arial{s_separator} 11 px{s_separator} style=Bold, Italic, Strikeout", "Arial", 11f, (int)GraphicsUnit.Pixel, (int)(FontStyle.Bold | FontStyle.Italic | FontStyle.Strikeout));
            testData.Add(culture, $"arIAL{s_separator} 10{s_separator} style=bold", "arIAL", 10f, (int)GraphicsUnit.Point, (int)FontStyle.Bold);
            testData.Add(culture, $"Arial{s_separator} 10{s_separator}", "Arial", 10f, (int)GraphicsUnit.Point, (int)FontStyle.Regular);
            testData.Add(culture, $"Arial{s_separator}", "Arial", PropertyDefaultValue.FontSize, (int)GraphicsUnit.Point, (int)FontStyle.Regular);
            testData.Add(culture, $"Arial{s_separator} 10{s_separator} style=12", "Arial", 10f, (int)GraphicsUnit.Point, (int)(FontStyle.Underline | FontStyle.Strikeout));
            testData.Add(culture, $"Courier New{s_separator} Style=Bold", "Courier New", PropertyDefaultValue.FontSize, (int)GraphicsUnit.Point, (int)FontStyle.Bold); // FullFramework style keyword is case sensitive.
            testData.Add(culture, $"{s_separator} 10{s_separator} style=bold", "", 10f, (int)GraphicsUnit.Point, (int)FontStyle.Bold);

            // NOTE: in .NET runtime these tests will result in FontName='', but the implementation relies on GDI+, which we don't have...
            testData.Add(culture, $"11px{s_separator} Style=Bold", $"11px", PropertyDefaultValue.FontSize, (int)GraphicsUnit.Point, (int)FontStyle.Bold);
            testData.Add(culture, $"11px", "11px", PropertyDefaultValue.FontSize, (int)GraphicsUnit.Point, (int)FontStyle.Regular);
            testData.Add(culture, $"Style=Bold", "Style=Bold", PropertyDefaultValue.FontSize, (int)GraphicsUnit.Point, (int)FontStyle.Regular);
        }

        return testData;
    }

    [Theory]
    [MemberData(nameof(TestConvertFormData))]
    internal void TestConvertFrom(CultureInfo culture, string input, string expectedName, float expectedSize, int expectedUnits, int expectedFontStyle)
    {
        Thread.CurrentThread.CurrentCulture = culture;

        FontDescriptor font = FontConverter.ConvertFrom(input)!;

        Assert.Equal(expectedName, font.Name);
        Assert.Equal(expectedSize, font.Size);
        Assert.Equal(expectedUnits, (int)font.Unit);
        Assert.Equal(expectedFontStyle, (int)font.Style);
    }

    public static TheoryData<string> ArgumentExceptionFontConverterData()
        => new()
        {
                { $"Courier New{s_separator} 11 px{s_separator} type=Bold{s_separator} Italic" },
                { $"Courier New{s_separator} {s_separator} Style=Bold" },
                { $"Courier New{s_separator} 11{s_separator} Style=" },
                { $"Courier New{s_separator} 11{s_separator} Style=RandomEnum" },
                { $"Arial{s_separator} 10{s_separator} style=bold{s_separator}" },
                { $"Arial{s_separator} 10{s_separator} style=null" },
                { $"Arial{s_separator} 10{s_separator} style=abc#" },
                { $"Arial{s_separator} 10{s_separator} style=##" },
                { $"Arial{s_separator} 10display{s_separator} style=bold" },
                { $"Arial{s_separator} 10style{s_separator} style=bold" },
        };

    [Theory]
    [MemberData(nameof(ArgumentExceptionFontConverterData))]
    public void InvalidInputThrowsArgumentException(string input)
    {
        Assert.Throws<ArgumentException>(() => FontConverter.ConvertFrom(input));
    }

    public static TheoryData<string, string> InvalidEnumArgumentExceptionFontConverterData()
        => new()
        {
                { $"Arial{s_separator} 10{s_separator} style=56", "style" },
                { $"Arial{s_separator} 10{s_separator} style=-1", "style" },
        };

    [Theory]
    [MemberData(nameof(InvalidEnumArgumentExceptionFontConverterData))]
    public void InvalidInputThrowsInvalidEnumArgumentException(string input, string paramName)
    {
        Assert.Throws<InvalidEnumArgumentException>(paramName, () => FontConverter.ConvertFrom(input));
    }

    [Fact]
    public void EmptyStringInput()
    {
        FontDescriptor? font = FontConverter.ConvertFrom(string.Empty);
        Assert.Null(font);
    }
}
